Rapaflo's advantage over flomax is that it is supposed to work the same but allow you to ejaculate regularly and not into your bladder like flomax often does. I however was not able to take Rapaflo because I had zero energy while taking it. Flomax worked the best for me to relax the prostate but would still make me sluggish. I found it best to take at night to sleep off some of the side effects. I took it for almost a year and the sexual side effect diminished and i was able to climax normally.